Problems

Problem search

Point range
Go Random
Problem Category ▴ Points AC % Users
CB Open 2024 Problem 5 - Stopping Rumours CBOJ 10 33.3% 3
CB Open 2024 Problem 2 - Nikola and the Teslas CBOJ 7 53.8% 5
CBOJ Fall Challenge '24 P3 - Domino Tiling CBOJ 7 46.2% 4
CBOJ Fall Challenge '24 P1 - Building Squares CBOJ 3 31.8% 12
CBOJ Fall Challenge '24 P4 - Factor Graph CBOJ 7 12.5% 3
CBOJ Fall Challenge '24 P2 - Collatz Conjecture CBOJ 5 70.0% 6
CCC '19 J5 - Rule of Three CCC 15p 40.0% 6
CCC '15 J5 - π-day CCC 15p 29.9% 10
CCC '03 S5 - Trucking Troubles CCC 15p 60.0% 6
CCC '20 S2 - Escape Room CCC 12p 12.1% 9
CCC '19 S3 - Arithmetic Square CCC 15p 6.6% 4
CCC '21 S1 - Crazy Fencing CCC 5 45.7% 11
CCC '21 S3 - Lunch Concert CCC 10p 38.9% 6
CCC '21 S4 - Daily Commute CCC 12p 24.0% 5
CCC '21 S5 - Math Homework CCC 12p 44.4% 3
CCC '21 S2 - Modern Art CCC 7p 24.2% 9
CCC '20 S3 Easy - Searching for Strings CCC 12p 69.8% 10
CCC '20 S3 - Searching for Strings CCC 15p 15.5% 8
Count Divisors Club 5 25.8% 12
Sum of Occurrences Club 3 27.5% 13
A Sum Problem Club 5 22.7% 19
A Prime Problem Club 12 1.2% 2
A Math Problem (Easy) Club 7 25.2% 36
Iceberg Hopping Club 10p 14.7% 6
Close Matchups Club 7p 27.5% 8
Point of Intersection Club 10p 13.4% 6
Public Service Announcement Club 7p 40.5% 12
A Difference Array Problem Club 7p 36.4% 6
Graph Theory: Intro Club 5 26.6% 10
Graph Theory: Connectivity Club 10 42.4% 12
Graph Theory: Shortest Path Club 10 40.4% 10
Graph Theory: Weighted Graph Club 12 16.5% 7
Fibonacci 1 Club 5 76.1% 14
Perfectly Even Numbers Club 5 21.8% 11
Perfectly Even Numbers (Extreme) Club 15 12.1% 6
Fibonacci 2 Club 7 33.8% 11
Making a Necklace Club 10p 31.4% 6
Placing Kings Club 10p 75.8% 10
A Fenwick Tree Problem Club 15p 17.9% 6
A Binary Search Problem Club 7 17.2% 8
Allen's Graph Club 7 40.6% 8
A Dynamic Programming Problem Club 20 3.1% 2
CBOJ 2022 Welcome Contest Problem 3 - Suspicious Cells Club 5 61.9% 9
CBOJ 2022 Welcome Contest Problem 2 - First Day of School Club 5 29.0% 8
CBOJ 2022 Welcome Contest Problem 1 - Kernel Bye Computer Science Lovers Club 3 40.0% 11
CBOJ 2022 Welcome Contest Problem 4 - Highest Weight Path Club 7p 16.4% 6
CBOJ Exec Selection Contest 2 Problem 4 - George's Graph Club 10 40.0% 3
CBOJ Exec Selection Contest 2 Problem 3 - Anita's Array Club 7 20.7% 5
CBOJ Exec Selection Contest 2 Problem 5 - Obligatory Data Structure Problem Club 12 10.0% 3
CBOJ Exec Selection Contest 2 Problem 2 - Patryk and Primes Club 5 26.2% 7